Bae Joohyun is a scholar freshman student at Jihye Seoul University. Some people usually think that she is from a family of rich and powerful people in Seoul. A heiress, some might say. Because of her stunning beauty, all the boys, and even the girls, adore her. She has many suitors who give her letters and gifts, but she always rejects all of them, even the gifts and the letters. She always says that her heart already belongs to someone. The truth is, she has a tiny crush on Seulgi, the nerd in her class. She always denies it in front of her friends because they always tease her about having a crush on Seulgi. Seulgi is a good looking girl, always with a cold expression plastered on her face. No one dares talk to Seulgi except her friend Seungwan. Some guys try to hit on her, even girls. But at the end of the day, they were all rejected by her. On the other hand, having a love life is not Joohyun's priority. Their family is tight on money, which is why she needs to work while studying. While at work, the bad news suddenly flashes on her phone. Her mother was sick and needed surgery as soon as possible, or else she would die. The money that she earns from working in a cafe does not work. Even if she works over time, it is still not enough to pay the bills at the hospital. She is the breadwinner of her family, and she will do anything to save her mother's life, even if it means risking her own.